of fulton



Dec. 24, 1929. w. L. wRlGHT 1,740,966

TAPERED PAPER CONTAINER Filed June 27. 1928 lllllllglglll/I,

Patented Dec. 24, 1929 UNITED STATES PATENT OFFICE WILBUR L; WRIGHT,OFVFULTON, NEW YORK, ASSIGNOR TO OSWEGO FALLS CORPORA- TION, 0F FULTON,NEW YORK, .A CORPORATION 0F YORK T APEREI) PAER CONTAINER Applicationfiled' June 27,

The essential purpose of this invention is to render more certain theliquid tight qualities of the bottom closures of paper containers,particularly those of tapered or so-called conical form, and tofso formthe container bottom and bottom closure as to stiffen and strengthen thesame against blows or pressure tending to so distort or deform the con-Atainer as to destroy or partially destroy the liquid tight qualities ofthe joint between the container body and its bottom closure, and thoseskilled in the art will readily understand the purpose and object of theinvention in t-he light of the following explanations of theaccompanying drawings-that illustrate what I now believe to be `thepreferred mechanical expressions or embodiments of my invention fromamong other forms within the spirit and scope thereof..

Viith lthe foregoing and other objects in view my invention consists incertain novel features and cooperating formations and elements as moreparticularly described and specified hereinafter. y Y

Referring to the accompanying drawings forming part hereof Fig. l showsin part an upwardlyfconvergh ing tapered mandrel anda plunger in sideelevation, and the small end portion of a tapered paper container barrelor body and a smooth-cut oversize inner sti paper disk vertical section,the upper end of the barrel being expanded and the disk seated againstan annular ledgek in thev barrelby the plunger after being ldriventhrough saidk end by the plunger. Y p

Fig. 2 is a similar view with the exception that an oversizeannularly-flanged. outer paper disk is shown in vertical section drivenby the plunger through the expanded end and tightly pressed against. theinner disk.

Fig. 3 shows lthe mandrel in side elevation, and in vertical sectionshows the paper barrel and inner and outer disks and a rim forming anddisk securing crimp, as well. as the crimping or spinning head invertical section.

Fig. 4 shows a tapered or frustro-conical paper container or bottleembodying my invention and partially broken away, the paper container ofthis figure of the drawing show'- 1928. Serial No. 288,596.

ing the bottom closure inthe large end of the tapered barrel, whereasFig. 3 shows the same in the small end of the paper barrel.

Fig. 5 is a detail vertical section of the structure of Fig. l on anenlarged scale.

The conical or tapered paper containers disclosed comprise a. paperbarrel that is longitudinally tapered from a largerend toa small end. 'Y

, One end of this paper barrel vconstitutes the open top or mouth of thecontainer, that is adapted to receive a removable closure.

The other end of the ypaper barrel is provided with a permanent bottomclosure including an overlarge inside stiii:l smooth-cut disk 8, and anoverlarge outside annularly hanged disk 4, and this bottom structureinvolves a rim-forming and bottom closuresecuring crimp, and a peculiarformation of the lower end of the paper barrel, all designed to renderthe container liquid tight at its lower end and to strengthen the bottomclosure against damage tending to break the liquid tight joint'or seal.

The mouth of the container can be at either the large or small end ofthe tapered barrel and consequently the bottom closure can be at eitherthe small or large end of said barrel. y y

The paper barrel l, of the container is pref* erably formed by a fiatblank of strong stiff f the required tapered form with the longitudi- Ynal edges of the blank overlapping and permanently sealed and securedtogether to form liquid tight longitudinal seam la, throughout thelength of the tapered body.

The upper end of this tapered body or barrel l, isl preferably formed toprovide the container with a top rim and mouth usually either byapplying a neck ring thereto to provide a seat for a removable closure,or by spinning or crimping the upper end of the body outwardly anddownwardly, or other wise to provide a surrounding rim to receive a slipcover for theqcontainer.

The battom end of the tapered barrel when first formed is overlong, see1C.v This open method of bottoming the same, is forcibly enlarged indiameter from its large extremity inwardly a suitable distancelongitudinally towards the opposite end of the barrel, by outwardlystretching` and expanding the sheet paper to approximately cylindricalform of enlarged diameter. By thus expanding tie tapered barrel ond, anannular outwardly facing` intermediate internal ledge'vor shoulder 2, isformed in the barrell connecting the eX- panded end of the barrel andthe undisturbed tapered portion thereof of relatively reduced diameter.A. stiff strongusually heavy iinperforate paper or like fibrous materialdisk 3, of enlarged diameter with respect to said tapered portion of thebarrel and said ledge is driven longitudinally into the barrel throughsaid bottom end while held in a position transversely of and at rightangles to the longitudinal axis of the tapered body and while backed bythe driving plunger throughout the area of the outer surface of thedisk, and this disk is thus driven in and forcibly sealed against-saidledge or shoulder with the annularportion of the inner side face of thedisk tightly fitting the ledge and the peripheral edge of the disktightly fitting the inner surrounding surface of the enlarged end of thebarrel where `it merges into the ledge, all to form a tight'seal.

Theessential characteristic of this stiff flat or slightly dished disk3, is its smoth-cut cylindrical Vperipheral smootlnsurface' edge 3a.This smooth-surface surrounding cylindrical edge of the oversize stiffor heavy disk performs a peculiarly advantageous,function in that itestablishes a liquidtight joint by its intimate tight Contact with thesurrounding inner surface of the expanded end of the paper body orbarrel in cooperation with the annularliquid tight seal or jointestablished byand'between the enlarged annular ledge and the innersideface of the disk, and this last mentioned jointis concentric with'and continues inwardly toward the interior of the container from thetight jointor seal at the smooth peripheral edge-of the disk. Thissmooth cut disk also cooperates with other features and the flanged disk4, jin establishf ing` `a liquid tight bottom and in stiftening andstrengthening the bottom structure.`

The outer disk 4, is preferably struck up from more or less thinflexible sheet paper material to provide the `disk with an annulardepending skirt or flange 4a. This disk 4, is imperforate and itsexterior diameter. in the plane of vthe flat body portion of the disk,is as `near'as possible the same as the exterior diameter of the heavyinner disk 3. This flanged disk 4l, is also driven into the expandedbottom end of the otherwise tapered container barrel preferably by aplunger that maintains the flat body of the disk in a planeperpendicular to the longitudinal axis of the body, While contacting orbacking the flat center or body of said disk throughout the area ofouter side. The flanged disk '-.vith its flange directed outwardly andpreferably tightly held surrounding the driving` plunger, is thus forcedand driven into the container body end and forcibly pressed and seatedagainst and into parallelism with the outer face of the disk 3, and thetwo disks :are thus forced toward the ledge 2, against which the disk 3,is seated under comparatively henny pressure.

The' forcing plunger is then removed, learing the tivo tightly engagingparallel disks swaged into the container body end that is expandedthereby with the disk il, tight against the ledge 2, and the flangefitting tightly within and concentric with the outer expanded ond of thebody, and preferably terminating short thereof.

Thereupon, the projecting expanded end of the body with the flange Ll",therein, is turned, rolled or crimped inwardly and downwardly andsubjected to inward lonejitiulinul pressure, forming` preiferablylocked. crimp 5, to permanently look and hold the two disks and ledge,drawn tightly together and the expanded wall of the container' bodydrawn radially in tightly against the smooth cylindrical edge of disk 3,and against the outer surface of disk ALl, and its flange l". to thusiinmovably support said disks and secure the disks and container bodyiizredly together. This` multi-ply crimp 5, also provides the containerwith a stiflening strengthening aunular depending rim, wherebyv thebottoni disks are inset within the container body. and thisrim is notonly depending but forms the lower end of the body with a surroiuidiim'annular approximately eXteriorly-cyl i ud rical stiff rigid'enlarged rim5, by reason of the two overlarge interior parallel disks 3, 4, and theexpanded body end surrouiuliim74 said disks and turned in and up againstthe bottom of the flanged disk and holdingl the saine and the inner disktightly against and longitudinally immovable with respect to ledge Q.

This stiffI strong enlarged diameter surrounding and depending bottomrini serves to strengthen the lower end of the container aga-instdistortion and indenting under handling by blows and pressures, thatmight otherwise tend to separato or break the liquid tight joints orseals between the disks :ind ledge 2, and the disks and surroiuidingi`expanded body wall. The barrel tapers up wardly from the ledge orshoulder 2. and this annular radially or outwardly projecting` shoulder2, joins the tapered portion with the end rim of enlarged diameter, andthis projecting rim serves to protect and ward oif pressures and blowsthat might otherwise distort the shoulder portion of the barrel or the4bottom disks and result in breakingl the waterproofing and jointsealing` fillet or filling a, of paraffin or other sealing substance.

Such sealing material in melted liquid form is usually introduced intothe bottomed container to enter and harden in and seal the annular jointwhere the top disk lits under the ledge 2, the surplus melted paraffinbeing poured from the container. This fillet when hard and cool isbrittle and liable to become broken and dislodged by distortion orbending of the container body or disks, hence the advantage gained bythe formation and structure which reduces to the minimum possibility ofsuch distortion. However, it is not the intention to limit all featuresof the invention to the presence of such oint sealing deposit or fillet,inasmuch that the presence of the smooth cut inner disk in cooperationwith the flanged outer disk, the annular enlarged ledge or shoulder andthe inner surface of the expanded barrel end, establish a liquid tightseal that avoids the necessity of the waterproofing seal a, possiblyexcept as a factor of precautionary protection.

I have found that it is almost impossible to produce a flanged paperboard disk, such as 4, wherein the outer surface of the flange isuniformly smooth and without longitudinal channels or creases that tendto promote liquid seepage from the interior of the container bycapillary action or otherwise even where the flanged disk is overlargeand locked in the expanded end of the paper barrel and seated directlyagainst an annular internal ledge formed in the body by the bodyexpanding operation. Hence, the desirability of employing` the seal a,for the annular oint within the container between the shoulder and topsurface of the flanged disk. I have discovered however that thisdifficulty caused by the outer surface of the flanged disk is overcome,and certain other advantages are gained, by employing the smooth-cutstiff lnon-flanged inner disk, in the combination, as

hereinbefore described, firmly locked between the shoulder 2, and theflanged disk.

In the example shown, the tapered paper barrel, in the form shown byFigs. 1 to 3, is placed on a correspondingly tapered mandrel 10, havingan upper end reduced in diameter, and having a Hat top die face. Theoverlong upper end of the barrel 1, projects upwardly beyond thismandrel. The projecting upper end of the paper body can be expanded andcontracted to form the ledge 2, and the upper end of enlarged diameter,by suitable mechanism, or the barrel end might be expanded by driving inthe various disks by plungers, such as 11, and 11a, as shown, orotherwise. The plungers 11, 11, are flat and horizontal at their workingfaces to back and support the disks throughout their areas and thussupport and drive the same as hereinbefore described, and if so desiredsaid working faces can be rounded or convexed to convex the disks 3, 4,toward the interior of the body by the drag of the edge portions of thedisks on the inner surfaces of the paper barrel. The disks will thus beseated and secured in dished inwardly convexed form under constanttension to return to flat form of enlarged diameter with the edge of thedisks thus held under tension bearing radially outwardly against thesurrounding wall of the paper barrel. In Fig. 3, a crimping or spinninghead 12, is shown pressing the two disks tightly together and againstthe end die face of the mandrel and against the ledge 2, and ironing outthe outer approximately cylindrical face of the enlarged` rim portion5a, while completing the tight crimp 5, and exerting downward pressurethereon.

What I claim is 1. A container embodying a longitudinally tapered sheetpaper material body at one end portion expanded to an enlarged diameterand thereby forming an annular enlargeddiameter internal ledge joiningthe expanded portion with the tapered portion of the body; a stiliimperforate flat-cut paper material disk driven longitudinally throughsaid enlarged end and tightly pressed against said ledge; a flangedpaper material disk driven longitudinally through said expanded body endagainst said first mentioned disk; and a disk locking and supportingcrimp between the expanded body end and the flanged disk, whereby thesmooth-cut disk is held in against the ledge and the expanded body endis drawn radially and annularly inwardly into liquid tight engagementwith the peripheral portions of the two disks.

2. A container embodying a paper material body expanded at one end toprovide an interior annular ledge; an inner stili" oversize smooth-cutbottom disk driven through said expanded end tightly against saidshoulder; an oversize annularly flanged outer paper disk driven throughsaid expanded end tightly against said inner disk; the expanded end ofthe body being crimped over the flange of the disk and against theflanged disk to lock the disks together and against said ledge and toform the container with a surrounding stiff enlarged rim and a dependingbottom rim.

3. A container embodying a longitudinally tapered paper body at itsbottom end portion having an internal annular ledge; a smooth-cut stiEinner bottom disk driven through said end and seated at its inner sideface against said ledge with the cylindrical peripheral edge of saiddisk in tight sealing engagement with the surrounding inner surface ofthe body.; an annularly-flanged outer bottom disk driven into said bodyend tightly against said inner disk; and a disk locking crimp formingthe container with a bottom seal protecting stiffening annular rim.

Signed at Fulton, county of Oswego, State of New York, this 25th day ofJ une, 1928.

WILBUR L. WRIGHT.

